<!-- 我的商品收藏 -->
<template>
  <s-layout title="商品收藏">
    <view class="cart-box ss-flex ss-flex-col ss-row-between">
      <!-- 头部 -->
      <view class="cart-header ss-flex ss-col-center ss-row-between ss-p-x-30">
        <view class="header-left ss-flex ss-col-center ss-font-26">
          共 <text class="goods-number ui-TC-Main ss-flex">{{ state.pagination.total }}</text> 件商品
        </view>
        <view class="header-right">
          <button v-if="state.editMode && state.pagination.total" class="ss-reset-button" @tap="state.editMode = false">
            取消
          </button>
          <button
            v-if="!state.editMode && state.pagination.total"
            class="ss-reset-button ui-TC-Main"
            @tap="state.editMode = true"
          >
            编辑
          </button>
        </view>
      </view>
      <!-- 内容 -->
      <view class="cart-content">
        <view v-for="item in state.pagination.list" :key="item.id" class="goods-box ss-r-10 ss-m-b-14">
          <view class="ss-flex ss-col-center">
            <label v-if="state.editMode" class="check-box ss-flex ss-col-center ss-p-l-10" @tap="onSelect(item.spuId)">
              <radio
                :checked="state.selectedCollectList.includes(item.spuId)"
                color="var(--ui-BG-Main)"
                style="transform: scale(0.8)"
                @tap.stop="onSelect(item.spuId)"
              />
            </label>
            <s-goods-item
              :title="item.spuName"
              :img="item.picUrl"
              :price="item.price"
              price-color="#FF3000"
              :title-width="400"
              @tap="
                sheep.$router.go('/pages/goods/index', {
                  id: item.spuId,
                })
              "
            />
          </view>
        </view>
      </view>

      <!-- 底部 -->
      <su-fixed v-show="state.editMode" bottom :val="0" placeholder>
        <view class="cart-footer ss-flex ss-col-center ss-row-between ss-p-x-30 border-bottom">
          <view class="footer-left ss-flex ss-col-center">
            <label class="check-box ss-flex ss-col-center ss-p-r-30" @tap="onSelectAll">
              <radio
                :checked="state.selectAll"
                color="var(--ui-BG-Main)"
                style="transform: scale(0.7)"
                @tap.stop="onSelectAll"
              />
              <view> 全选 </view>
            </label>
          </view>
          <view class="footer-right">
            <button class="ss-reset-button ui-BG-Main-Gradient pay-btn ss-font-28 ui-Shadow-Main" @tap="onCancel">
              取消收藏
            </button>
          </view>
        </view>
      </su-fixed>
    </view>
    <uni-load-more
      v-if="state.pagination.total > 0"
      :status="state.loadStatus"
      :content-text="{
        contentdown: '上拉加载更多',
      }"
      @tap="loadMore"
    />
    <s-empty v-if="state.pagination.total === 0" text="暂无收藏" icon="/static/collect-empty.png" />
  </s-layout>
</template>

<script setup>
import sheep from '@/sheep'
import { reactive } from 'vue'
import { onLoad, onReachBottom } from '@dcloudio/uni-app'
import _ from 'lodash'
import FavoriteApi from '@/api/product/favorite'
import { resetPagination } from '@/utils/public'

const sys_navBar = sheep.$platform.navbar

const state = reactive({
  pagination: {
    list: [],
    total: 0,
    pageNo: 1,
    pageSize: 6,
  },
  loadStatus: '',

  editMode: false,
  selectedCollectList: [], // 选中的 SPU 数组
  selectAll: false,
})

async function getData() {
  state.loadStatus = 'loading'
  const { code, data } = await FavoriteApi.getFavoritePage({
    pageNo: state.pagination.pageNo,
    pageSize: state.pagination.pageSize,
  })
  if (code !== 0) {
    return
  }
  state.pagination.list = _.concat(state.pagination.list, data.list)
  state.pagination.total = data.total
  state.loadStatus = state.pagination.list.length < state.pagination.total ? 'more' : 'noMore'
}

// 单选选中
const onSelect = (spuId) => {
  if (!state.selectedCollectList.includes(spuId)) {
    state.selectedCollectList.push(spuId)
  } else {
    state.selectedCollectList.splice(state.selectedCollectList.indexOf(spuId), 1)
  }
  state.selectAll = state.selectedCollectList.length === state.pagination.list.length
}

// 全选
const onSelectAll = () => {
  state.selectAll = !state.selectAll
  if (!state.selectAll) {
    state.selectedCollectList = []
  } else {
    state.selectedCollectList = state.pagination.list.map((item) => item.spuId)
  }
}

async function onCancel() {
  if (!state.selectedCollectList) {
    return
  }
  // 取消收藏
  for (const spuId of state.selectedCollectList) {
    await FavoriteApi.deleteFavorite(spuId)
  }

  // 清空选择 + 重新加载
  state.editMode = false
  state.selectedCollectList = []
  state.selectAll = false
  resetPagination(state.pagination)
  await getData()
}

// 加载更多
function loadMore() {
  if (state.loadStatus === 'noMore') {
    return
  }
  state.pagination.pageNo++
  getData()
}

onReachBottom(() => {
  loadMore()
})

onLoad(() => {
  getData()
})
</script>

<style lang="scss" scoped>
.cart-box {
  .cart-header {
    height: 70rpx;
    background-color: #f6f6f6;
    width: 100%;
    position: fixed;
    left: 0;
    top: v-bind('sys_navBar') rpx;
    z-index: 1000;
    box-sizing: border-box;
  }

  .cart-footer {
    height: 100rpx;
    background-color: #fff;

    .pay-btn {
      height: 80rpx;
      line-height: 80rpx;
      border-radius: 40rpx;
      padding: 0 40rpx;
      min-width: 200rpx;
    }
  }

  .cart-content {
    width: 100%;
    margin-top: 70rpx;
    padding: 0 20rpx;
    box-sizing: border-box;
    .goods-box {
      background-color: #fff;
      &:last-child {
        margin-bottom: 40rpx;
      }
    }
  }
}
</style>
